gistfile1.txt

[subbu@earth jruby] java -cp ~/software/jruby/lib/jruby.jar org.jruby.compiler.ir.IR_Builder -e "a = 3; b = [a]; c = [1,a,b]; x,y,z = *c; p = y; i,j=*z;t = c[2][0]+ i*1.5-c[1]/c[0]"
------------------ Before local optimization pass ---------------------
Script: file: "-e"
  constants: {__SCRIPT_ROOT__=Class __SCRIPT_ROOT__}
Class: __SCRIPT_ROOT__Module: __SCRIPT_ROOT__
Method: :_ROOT_:__SCRIPT_ROOT__

  instrs:
  0		self = RECV_ARG(0)
  1		a = 3:fixnum
  2		b = Array:[a]
  3		c = Array:[1:fixnum, a, b]
  4		%v_0 = *c
  5		%v_1 = %v_0[0] (GET_ARRAY)
  6		x = %v_1
  7		%v_2 = %v_0[1] (GET_ARRAY)
  8		y = %v_2
  9		%v_3 = %v_0[2] (GET_ARRAY)
  10		z = %v_3
  11		p = y
  12		%v_4 = *z
  13		%v_5 = %v_4[0] (GET_ARRAY)
  14		i = %v_5
  15		%v_6 = %v_4[1] (GET_ARRAY)
  16		j = %v_6
  17		%v_7 = CALL([], [c, 2:fixnum])
  18		%v_8 = CALL([], [%v_7, 0:fixnum])
  19		%v_9 = CALL(*, [i, 1.5:float])
  20		%v_10 = CALL(+, [%v_8, %v_9])
  21		%v_11 = CALL([], [c, 1:fixnum])
  22		%v_12 = CALL([], [c, 0:fixnum])
  23		%v_13 = CALL(/, [%v_11, %v_12])
  24		%v_14 = CALL(-, [%v_10, %v_13])
  25		t = %v_14

  live variables:
    %v_0: 4-9
    %v_1: 5-6
    %v_10: 20-24
    %v_11: 21-23
    %v_12: 22-23
    %v_13: 23-24
    %v_14: 24-25
    %v_2: 7-8
    %v_3: 9-10
    %v_4: 12-15
    %v_5: 13-14
    %v_6: 15-16
    %v_7: 17-18
    %v_8: 18-20
    %v_9: 19-20
    c: 3-22
    i: 14-19
    y: 8-11
------------------ After local optimization pass ---------------------
Script: file: "-e"
  constants: {__SCRIPT_ROOT__=Class __SCRIPT_ROOT__}
Class: __SCRIPT_ROOT__Module: __SCRIPT_ROOT__
Method: :_ROOT_:__SCRIPT_ROOT__

  instrs:
  0		self = RECV_ARG(0)
  1		a = 3:fixnum
  2		b = Array:[3:fixnum]
  3		c = Array:[1:fixnum, 3:fixnum, b]
  4		%v_0 = *Array:[1:fixnum, 3:fixnum, b]
  5		%v_1 = %v_0[0] (GET_ARRAY)
  6		x = 1:fixnum
  7		%v_2 = %v_0[1] (GET_ARRAY)
  8		y = 3:fixnum
  9		%v_3 = %v_0[2] (GET_ARRAY)
  10		z = b
  11		p = 3:fixnum
  12		%v_4 = *Array:[3:fixnum]
  13		%v_5 = %v_4[0] (GET_ARRAY)
  14		i = 3:fixnum
  15		%v_6 = %v_4[1] (GET_ARRAY)
  16		j = nil
  17	[DEAD]	%v_7 = CALL([], [c, 2:fixnum])
  18		ASSERT_METHOD_VERSION(Array:[]=15L, LBL_0)
  19		%v_7 = b
  20	[DEAD]	%v_8 = CALL([], [b, 0:fixnum])
  21		%v_8 = 3:fixnum
  22	[DEAD]	%v_9 = CALL(*, [3:fixnum, 1.5:float])
  23		ASSERT_METHOD_VERSION(Fixnum:*=8L, LBL_0)
  24		%v_9 = 4.5:float
  25	[DEAD]	%v_10 = CALL(+, [3:fixnum, 4.5:float])
  26		ASSERT_METHOD_VERSION(Fixnum:+=5L, LBL_0)
  27		%v_10 = 7.5:float
  28	[DEAD]	%v_11 = CALL([], [c, 1:fixnum])
  29		%v_11 = 3:fixnum
  30	[DEAD]	%v_12 = CALL([], [c, 0:fixnum])
  31		%v_12 = 1:fixnum
  32	[DEAD]	%v_13 = CALL(/, [3:fixnum, 1:fixnum])
  33		ASSERT_METHOD_VERSION(Fixnum:/=7L, LBL_0)
  34		%v_13 = 3:fixnum
  35	[DEAD]	%v_14 = CALL(-, [7.5:float, 3:fixnum])
  36		ASSERT_METHOD_VERSION(Float:-=11L, LBL_0)
  37		%v_14 = 4.5:float
  38		t = 4.5:float

  live variables:
    %v_0: 4-9
    %v_4: 12-15
    b: 2-20
    c: 3-30
[subbu@earth jruby] irb
irb(main):001:0> a = 3; b = [a]; c = [1,a,b]; x,y,z = *c; p = y; i,j=*z;t = c[2][0]+ i*1.5-c[1]/c[0] 
=> 4.5